I'm studying for the CIT test and have a question about spoofing, or maybe
several questions....anyway.  I've checked through two different books, but
they just refer to it without going in depth at all.  All I could find on
cisco.com was configs with spoofing in them, but no good explanation.
I understand a BRI 0 will show as "line protocol is up (spoofing)" and this
means the line isn't necessarily up, but the router is holding the routing
entry.
Why would that be necessary?  Isn't the line going to come up and open a
call when traffic requires it even if the line is down?  Will spoofing make
it come up quicker?  I've been testing this out, but I don't have a real
ISDN line or simulator to work with, so there's not much I can really do.  I
did a clear int bri 0 and saw that it brought the line down - is there a way
to bring the line up again manually, without an actual connection being
triggered by traffic, and get it back to the spoofing state?
thanks,
Aaron





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